Warning!
The voltage monitoring outputs are for Enclustra-use only. Pinout changes may be applied between
revisions.
2.12 Clock Generation
A 33.33 MHz oscillator is used for the Mercury+ XU6 SoC module clock generation; the 33.33 MHz clock is
fed to the PS.
A 100 MHz LVDS oscillator and a 27 MHz CMOS oscillator provide reference clock inputs to the PS GTR bank
505. A 24 MHz clock and a 25 MHz clock are used for the USB PHYs and Ethernet PHYs respectively. The
crystal pads for the MPSoC RTC are connected to a 32.768 kHz oscillator on the Mercury+ XU6 SoC module.
Table 19 describes the clock connections to the MPSoC device.
Signal Name Frequency Package Pin MPSoC Pin Type
CLK33 33.33 MHz R16 PS_REF_CLK
CLK27_GTR_P
27 MHz
A21 PS_MGTREFCLK3P_505
CLK27_GTR_N A22 PS_MGTREFCLK3N_505
CLK100_GTR_P
100 MHz
C21 PS_MGTREFCLK2P_505
CLK100_GTR_N C22 PS_MGTREFCLK2N_505
PS_PADI
32.768 kHz
N17 PS_PADI (crystal pad input for MPSoC built-in RTC)
PS_PADO N18 PS_PADO (crystal pad output for MPSoC built-in RTC)
Table 19: Module Clock Resources
2.13 Reset
The power-on reset signal (POR) and the PS system reset signal (SRST) of the MPSoC device are available
on the module connector.
Pulling PS_POR# low resets the MPSoC device, the Ethernet and the USB PHYs, and the QSPI and eMMC
flash devices. Please refer to the Enclustra Module Pin Connection Guidelines [10] for general rules regarding
the connection of reset pins.
Pulling PS_SRST# low resets the MPSoC device and enables the connection between QSPI flash and module
connector, allowing the flash to be programmed from an external SPI master.
For details on the functions of the PS_POR_B and PS_SRST_B signals refer to the Zynq UltraScale+ MPSoC
Technical Reference Manual [18].
Table 20 presents the available reset signals. Both signals, PS_POR# and PS_SRST#, have on-board 4.7
kΩ pull-up resistors to VCC_CFG_MIO. For on-board devices using 1.8 V signaling, a PS_POR# low voltage
variant is generated (PS_POR#_LS).
D-0000-464-001 33 / 58 Version 02, 21.07.2021
To Next Page
Loading...
Need help?
General
